I found a new TOY
Under $20 from China - inspection camera: only 10mm dia, five meter cable, usb powered, led lighted camera, waterproof. On Ebay - look for
"USB Borescope Waterproof Inspection Lens Camera"
Leaving soon for long trip so I won't order until we get back. If in hurry US sellers under $30.
Edit: Maybe it got even better! Found free android app that should work with it
" iBORESCOPE "
Suzie & Chuck USNR USAF USCGA
Challenger Owners Club
2015 37KT Challenger, Demco Commander tow bar, Ready Brake, Sewer Solutions, Safe-T-Plus 41-230, 5-Star tune with 2014 Ford Fiesta behind us & 385 FastTrack kayak inside.